CN107824207B - Preparation method of silver phosphate composite photocatalyst for treating malachite green in water body - Google Patents
Preparation method of silver phosphate composite photocatalyst for treating malachite green in water body Download PDFInfo
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- 229910000161 silver phosphate Inorganic materials 0.000 title claims abstract description 24
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 title claims abstract description 22
- 229940107698 malachite green Drugs 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 13
- FJOLTQXXWSRAIX-UHFFFAOYSA-K silver phosphate Chemical compound [Ag+].[Ag+].[Ag+].[O-]P([O-])([O-])=O FJOLTQXXWSRAIX-UHFFFAOYSA-K 0.000 title claims abstract description 13
- 229940019931 silver phosphate Drugs 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910002370 SrTiO3 Inorganic materials 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 12
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 12
- 238000001291 vacuum drying Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 8
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims abstract description 8
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims abstract description 8
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 6
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910000397 disodium phosphate Inorganic materials 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 43
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 13
- 239000012498 ultrapure water Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910019142 PO4 Inorganic materials 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
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- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
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- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/188—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
-
- B01J35/39—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention discloses a preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body. Comprises the following steps of (1) adding HNO3Carrying out ultrasonic treatment on the treated multi-walled carbon nanotubes (MWCNTs) for 2-5 h; (2) mixing AgNO3Dropwise adding the solution into the MWCNTs solution, and stirring for 6-20 h in a dark place; (3) mixing Na2HPO4·12H2Dropwise adding O into the solution, stirring in the dark for 1-6 h, and then carrying out vacuum drying; (4) will (CH)3)2CHO]4Ti、Sr(Ac)2And Cr (NO)3)3·9H2Uniformly mixing O in an ethylene glycol solution according to a molar ratio of 20:19:1, and continuously stirring at 120-160 ℃ until the solution becomes a powder state; (5) stirring and mixing the obtained powder with 2-6 mol/L NaOH solution for 20-60 min, placing the mixture in a hydrothermal reaction kettle, and reacting at 180 ℃ for 30-40 h; (6) MWCNTs @ Ag3PO4Performing ultrasonic treatment for 10-60 min, adding polyvinylpyrrolidone solution, stirring for 20-60 min, and adding the Cr subjected to ultrasonic treatment to SrTiO3Dropwise adding the solution into the stirring solution, reacting for 3-8 h, washing and drying to obtain Ag3PO4@MWCNTs@Cr:SrTiO3. The material prepared by the invention has the advantages of environmental protection, economy, good visible light catalytic performance and the like.
Description
Technical Field
The invention belongs to the technical field of photocatalytic application and environmental protection of semiconductor materials, and particularly relates to a preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body
Background
With the increasing population, the demand of people for energy is increasing day by day, and the energy crisis and environmental problems are becoming more serious due to the environmental pollution caused by the over-exploitation of non-renewable energy and the poor-quality energy application. Solar energy is a clean and renewable energy source, and is concerned about solving the energy crisis, but how to effectively utilize solar energy and realize sustainable development is undoubtedly a problem which needs to be solved urgently in all countries at present. The photocatalysis technology is a novel green technology, is developed rapidly in the fields of development of new energy and water pollution treatment, and mainly utilizes the characteristic that a semiconductor photocatalysis material is excited and activated under the illumination condition to convert light energy into chemical energy, thereby achieving the effects of oxidizing and decomposing organic pollutants, killing bacteria, reducing heavy metal ions, eliminating peculiar smell and the like.
The research on the photocatalytic material is gradually carried out at present by TiO2And the full-wavelength photocatalytic material mainly based on near ultraviolet rays in sunlight penetrates into the visible-light photocatalytic material. The visible light material can respond to visible light and has the capacity of treating organic pollutants through visible light catalytic oxidation. However, the single semiconductor photocatalytic material has the problem of low quantum efficiency, and the fundamental reason is that the recombination process of photogenerated electron-hole pairs is far faster than the capture-transfer process. Currently, inhibiting the recombination of photo-generated electrons and holes is an important method for improving the photocatalytic efficiency. The improvement of the quantum yield of the photocatalytic process through modification measures such as nanocrystallization, semiconductor compounding, ion doping, noble metal deposition, photosensitization and the like is an important way for solving the problem. And the formation of nano-heterojunctions is another important method for realizing the effective separation of photogenerated electrons and holes. Heterojunctions are composed of different single-crystal materials of semiconductors and have a range of properties different from those of a single semiconductor, such as rectification, photovoltaic and optical waveguide effects. The heterojunction formed by selecting semiconductors with different band gaps can expand the utilization range of sunlight, and meanwhile, the photo-induced charge separation can be promoted, so that the life cycle of carriers is prolonged, and the photocatalysis efficiency is improved in mechanics. The general heterojunction structure enables photogenerated electrons and holes to be respectively gathered on a conduction band and a valence band with lower energy, and the life cycle of carriers can be effectively prolonged. The Z-type heterojunction is used as a special heterojunction, and the ternary heterojunction structure can enable photo-generated electrons and holes to be respectively gathered on conduction bands and valence bands with higher energy of different semiconductors, so that the Z-type heterojunction has the advantages of a common heterojunction, and can improve the activity of the photo-generated electrons and the holes, thereby further improving the photocatalytic performance.
Ag related to the present invention3PO4The visible light quantum efficiency is as high as 90%, and the visible light catalytic activity is excellent. In Ag3PO4And Cr SrTiO3The modified multi-walled carbon nanotubes (MWCNTs) are doped, and the good photoelectric property of the MWCNTs is utilized to achieve the effect of transferring and transporting photo-generated electrons and holes. The special one-dimensional grid structure can make the crystal structure and particle size more uniform, and the excellent adsorption performance can effectively shorten pollutant molecules to materialsMigration time of the charge surface. And Ag3PO4And Cr SrTiO3The Z-type heterojunction can be successfully constructed by the just matched energy band structure, and the photocatalytic performance is further improved.
Disclosure of Invention
The invention provides a preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body, the preparation method is simple and easy to operate, the prepared photocatalytic material has high-efficiency visible light catalytic activity, and the photocatalytic material has a high-efficiency degradation effect on organic pollutants under visible light.
A preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body comprises the following steps:
step 1) adding HNO3Carrying out ultrasonic treatment on the treated multi-walled carbon nanotubes (MWCNTs) for 2-5 h;
step 2) AgNO3Dropwise adding the solution into the MWCNTs solution, and stirring for 6-20 h in a dark place;
step 3) adding Na2HPO4·12H2Dropwise adding O into the solution, stirring in the dark for 1-6 h, and then carrying out vacuum drying;
step 4) reacting (CH)3)2CHO]4Ti、Sr(Ac)2And Cr (NO)3)3·9H2Uniformly mixing O in an ethylene glycol solution according to a molar ratio of 20:19:1, and continuously stirring at 120-160 ℃ until the solution becomes a powder state;
step 5) stirring and mixing the obtained powder with 2-6 mol/L NaOH solution for 20-60 min, placing the mixture in a hydrothermal reaction kettle, and reacting for 30-40 h at 180 ℃;
step 6) preparing MWCNTs @ Ag3PO4Performing ultrasonic treatment for 10-60 min, adding a polyvinylpyrrolidone solution, stirring for 20-60 min, and adding the Cr SrTiO subjected to ultrasonic treatment3Dropwise adding the solution into the stirring solution, reacting for 3-8 h, washing and drying to obtain Ag3PO4@MWCNTs@Cr:SrTiO3。
Preferably, the HNO in the step 1)3The treatment is to mix MWCNTs and HNO3Performing reflux treatment at 110-130 ℃ with a solid-to-liquid ratio of 2.5-3.5 g/L under stirringThe treatment time is 6-12 h. And after the reflux is finished, washing the mixture to be neutral by using ultrapure water, and drying the mixture in vacuum at 55-75 ℃. By HNO3The pretreated carbon nano tube can obviously enhance the active groups of-OH, -COOH, -CHO and the like on the surface, and the dispersibility, uniformity and stability of the carbon nano tube.
Preferably, AgNO described in step 2)3The mass ratio of the MWCNTs to the MWCNTs is 150: 1-165: 1.
Further preferably, Na is used in the step 3)2HPO4·12H2O and AgNO3The molar ratio of (A) to (B) is 1:3, and the vacuum drying temperature is 50-60 ℃.
Preferably, the specific preparation process in the step 4) is as follows: firstly Sr (Ac)2And Cr (NO)3)3·9H2Performing ultrasonic treatment on O in a molar ratio of 19:1 until the O is completely dissolved in an ethylene glycol solution, continuously stirring for 20-60 min, and then dropwise adding (CH)3)2CHO]4And (3) Ti solution. (CH)3)2CHO]4Ti and Sr (Ac)2In a molar ratio of 20: 19. And finally, transferring the mixed solution of the three components to an environment with the temperature of 120-160 ℃, and stirring until the solution becomes a gel powder state, wherein the treatment time is 10-16 h.
Preferably, the solid-to-liquid ratio of the powder prepared in the step 5) to 2-6 mol/L NaOH is 7-17 g/L, the volume of the NaOH solution is 50-70 mL, and the reaction kettle is a hydrothermal reaction kettle with a polytetrafluoroethylene lining and has the specification of 100 mL. After the hydrothermal reaction is finished, centrifuging the cooled solid-liquid mixture, washing the solid-liquid mixture with ethanol and ultrapure water for 3-5 times, and vacuum drying at 50-60 ℃.
Further preferably, the MWCNTs @ Ag in the step 6)3PO4The mass ratio of the polyvinylpyrrolidone to the polyvinylpyrrolidone is 1: 1-1: 1.5, and the MWCNTs @ Ag is3PO4With Cr SrTiO3The mass ratio of (A) to (B) is 10: 1-20: 1. The prepared material is washed 3-5 times by ethanol and ultrapure water, and the vacuum drying temperature is 50-60 DEG C
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention uses MWCNTs and Ag3PO4And Cr SrTiO3The three materials are compounded to successfully constructThe Z-type heterojunction visible light catalyst greatly improves the photocatalytic performance of the material.
(2) HNO doping in the invention3The modified MWCNTs have good photoelectric property, can effectively transfer photon-generated electrons and holes, and increase the life cycle of current carriers.
(3) The MWCNTs can make Ag on the structure3PO4The crystal structure and size of the crystal are more uniform, and the average particle size of the crystal is reduced, so that the photocatalytic performance is improved; in addition, the MWCNTs have excellent adsorption performance, the migration time of pollutant molecules reaching the surface of the material can be effectively shortened, and the photocatalytic performance of the composite material is further improved.
(4) The method has the advantages of simple operation, low cost, greenness and no pollution.
Drawings
FIG. 1 is a process flow diagram of a preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body
FIG. 2 is a graph showing the degradation curve of materials loaded with multi-walled carbon nanotubes (MWCNTs) in different proportions on malachite green
FIG. 3 shows Ag obtained by the preparation3PO4@MWCNTs@Cr:SrTiO3Electron microscope scan of
FIG. 4 shows different Cr/SrTiO loadings3Degradation curve of post-material to malachite green
FIG. 5 shows Ag obtained by the final preparation3PO4@MWCNTs@Cr:SrTiO3Full-wavelength absorption spectrum of malachite green solution under different illumination reaction times when degrading malachite green
Detailed Description
The invention is described in further detail below with reference to the figures and examples:
example (b):
selecting 25mg/L malachite green as a pollutant, adding 50mg of the prepared photocatalytic material, and irradiating the system by using a 300W xenon lamp light source (lambda is more than 420nm) as simulated sunlight. The method comprises the following specific steps:
(1) weighing 1g of multi-walled carbon nanotubes (MWCNTs) in 350mLHNO3In solution, at 120 ℃ stripAnd stirring and refluxing under the condition, wherein the treatment time is 8 h. After the reflux was completed, the mixture was washed to neutrality with ultrapure water and vacuum-dried at 70 ℃.
(2) 0.0095g of MWCNTs obtained by drying is weighed into 40mL of ultrapure water and treated by ultrasonic for 3 h.
(3) Weighing 1.53g AgNO3Dissolved in 30mL of ultrapure water, and the solution was added dropwise to the above
Continuously stirring the MWCNTs solution for 12h in a dark place;
(4) weighing 1.074g Na2HPO4·12H2O was dissolved in 30mL of ultrapure water, and the solution was gradually discarded
The solution is added dropwise and stirred for 6h in the dark. And carrying out centrifugal separation on the solid-liquid mixture, washing the solid-liquid mixture for 3-5 times by using ethanol and ultrapure water, and drying the solid-liquid mixture at 55 ℃ under a vacuum condition. Obtaining MWCNTs @ Ag with the MWCNTs loading capacity of 0.75 percent3PO4Materials, materials with different MWCNTs loading were prepared for degradation of malachite green solution, and the results are shown in fig. 2.
(5) Weighing 3.895gSr (Ac)2And 0.4gCr (NO)3)3·9H2Dissolving O in 60mL of ethylene glycol solution, stirring for 30min after completely dissolving, and dropwise adding 5.92mL (CH)3)2CHO]4And (3) Ti solution. Stirring for 30min, transferring to 150 deg.C oil bath, and stirring until the solution becomes gel powder.
(6) Stirring and mixing the obtained powder with 60mL of 5mol/L NaOH solution for 40min, placing the mixture in a 100mL hydrothermal reaction kettle with a polytetrafluoroethylene lining, reacting at 180 ℃ for 36h, washing, and vacuum drying at 60 ℃ to obtain Cr SrTiO3；
(7) Weighing 0.3g MWCNTs @ Ag3PO4Ultrasonic treating in 30mL of ultrapure water for 30min, adding 0.2g of polyvinylpyrrolidone into the solution, and stirring for 30 min. Weighing 0.0225gCr SrTiO3Ultrasonic treatment is carried out for 30min in 30mL of ultrapure water, and then Cr is SrTiO3Dropwise adding the solution into the stirred solution, reacting for 4h in a dark place, centrifuging, washing, and vacuum drying at 55 ℃ to obtain Cr SrTiO3MWCNTs @ Ag with load of 7.5%3PO4@Cr:SrTiO3A material. The scanning electron microscope characterization image is shown in FIG. 3. SrTiO of different Cr3The material prepared by loading is used for the degradation reaction of malachite green solution, and the degradation curve is shown in figure 4.
(8) 50mg of the prepared material is accurately weighed in 200mL of malachite green solution with the concentration of 25mg/L, continuously stirred and subjected to degradation reaction under the irradiation condition of a 300W xenon lamp (lambda is more than 420 nm). After 12min of illumination, malachite green could be completely degraded, and the reaction solution at different times was scanned at full wavelength with an ultraviolet spectrophotometer, the results are shown in fig. 5.
Claims (6)
1. A preparation method of a silver phosphate composite photocatalyst for treating malachite green in a water body comprises the following steps:
step 1) adding HNO3Carrying out ultrasonic treatment on the treated multi-walled carbon nanotubes (MWCNTs) for 2-5 h;
step 2) AgNO3Dropwise adding the solution into MWCNTs solution, and stirring for 6-20 h in a dark place, wherein the AgNO is3The mass ratio of the MWCNTs to the MWCNTs is 150: 1-165: 1;
step 3) adding Na2HPO4·12H2Dropwise adding O into the solution, stirring in the dark for 1-6 h, and then carrying out vacuum drying;
step 4) reacting [ (CH)3)2CHO]4Ti、Sr(Ac)2And Cr (NO)3)3·9H2Uniformly mixing O in an ethylene glycol solution according to a molar ratio of 20:19:1, and continuously stirring at 120-160 ℃ until the solution becomes a powder state;
step 5) stirring and mixing the obtained powder with 2-6 mol/L NaOH solution for 20-60 min, placing the mixture in a hydrothermal reaction kettle, and reacting for 30-40 h at 180 ℃;
step 6) preparing MWCNTs @ Ag3PO4Performing ultrasonic treatment for 10-60 min, adding polyvinylpyrrolidone solution, stirring for 20-60 min, and adding the Cr subjected to ultrasonic treatment to SrTiO3Dropwise adding the solution into the stirred solution, reacting for 3-8 h, washing and drying to obtain MWCNTs @ Ag3PO4@Cr:SrTiO3。
2. The preparation method of the silver phosphate composite photocatalyst for treating malachite green in the water body according to claim 1, characterized in that: HNO described in step 1)3The treatment is to mix MWCNTs and HNO3Carrying out reflux treatment under stirring at the temperature of 110-130 ℃ by using a solid-to-liquid ratio of 2.5-3.5 g/L for 6-12 h; and after the reflux is finished, washing the mixture to be neutral by using ultrapure water, and drying the mixture in vacuum at 55-75 ℃.
3. The preparation method of the silver phosphate composite photocatalyst for treating malachite green in the water body according to claim 1, characterized in that: step 3) said Na2HPO4·12H2O and AgNO3The molar ratio of (A) to (B) is 1:3, and the vacuum drying temperature is 50-60 ℃.
4. The preparation method of the silver phosphate composite photocatalyst for treating malachite green in the water body according to claim 1, characterized in that: the specific preparation process of the step 4) comprises the following steps: firstly Sr (Ac)2And Cr (NO)3)3·9H2Performing ultrasonic treatment on O in a molar ratio of 19:1 until the O is completely dissolved in an ethylene glycol solution, continuously stirring for 20-60 min, and then dropwise adding [ (CH)3)2CHO]4Ti solution; [ (CH)3)2CHO]4Ti and Sr (Ac)2In a molar ratio of 20: 19; and finally, transferring the mixed solution of the three components to an environment with the temperature of 120-160 ℃, and stirring until the solution becomes a gel powder state, wherein the treatment time is 10-16 h.
5. The preparation method of the silver phosphate composite photocatalyst for treating malachite green in the water body according to claim 1, characterized in that: the solid-liquid ratio of the powder prepared in the step 5) to 2-6 mol/L NaOH is 7-17 g/L, the volume of NaOH solution is 50-70 mL, and the reaction kettle is a hydrothermal reaction kettle with a polytetrafluoroethylene lining and has the specification of 100 mL; after the hydrothermal reaction is finished, centrifuging the cooled solid-liquid mixture, washing the solid-liquid mixture with ethanol and ultrapure water for 3-5 times, and vacuum drying at 50-60 ℃.
6. The preparation method of the silver phosphate composite photocatalyst for treating malachite green in the water body according to claim 1, characterized in that: step 6) the MWCNTs @ Ag3PO4The mass ratio of the polyvinylpyrrolidone to the polyvinylpyrrolidone is 1: 1-1: 1.5, and the MWCNTs @ Ag is3PO4With Cr SrTiO3The mass ratio of (A) to (B) is 10: 1-20: 1; the prepared material is washed 3-5 times by ethanol and ultrapure water, and the vacuum drying temperature is 50-60 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710628271.5A CN107824207B (en) | 2017-07-28 | 2017-07-28 | Preparation method of silver phosphate composite photocatalyst for treating malachite green in water body |
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| CN201710628271.5A CN107824207B (en) | 2017-07-28 | 2017-07-28 | Preparation method of silver phosphate composite photocatalyst for treating malachite green in water body |
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| CN108906093A (en) * | 2018-06-07 | 2018-11-30 | 湖南大学 | A kind of preparation method using carbon nanotube control silver orthophosphate crystal particle diameter |
| CN108892199A (en) * | 2018-06-07 | 2018-11-27 | 湖南大学 | A kind of method and technique using silver phosphate composite photocatalyst processing saliferous phenolic waste water |
| CN109433268A (en) * | 2018-06-07 | 2019-03-08 | 湖南大学 | A kind of preparation method using polyaniline control silver orthophosphate crystal particle diameter |
| CN108722482A (en) * | 2018-06-07 | 2018-11-02 | 湖南大学 | A kind of preparation method being total to modified phosphate silver composite photo-catalyst using carbon nanotube and polyaniline |
| CN108772080B (en) * | 2018-06-29 | 2020-12-01 | 台州职业技术学院 | Preparation method of one-dimensional nanowire composite photocatalyst with nano heterojunction |
| CN109999867A (en) * | 2019-04-28 | 2019-07-12 | 浙江理工大学 | A kind of flexible carbon fibre cloth@BiOCl@Ag3PO4Optic catalytic composite material and preparation method thereof |
| CN110201722B (en) * | 2019-06-13 | 2022-04-15 | 广东石油化工学院 | Silver phosphate composite photocatalyst for treating rose bengal B in high-salinity wastewater and preparation method and application thereof |
| CN110182888B (en) * | 2019-06-13 | 2022-04-12 | 广东石油化工学院 | Photocatalytic reaction device and process for treating rose bengal B high-salinity wastewater |
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